Goodwill and other intangible assets - components of intangible assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,612,646	$ 1,573,043
Accumulated Amortization	(412,671)	(356,323)
Customer lists
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	621,078	624,574
Accumulated Amortization	(214,924)	(192,876)
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	58,908	68,694
Accumulated Amortization	0	0
Intellectual property
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	522,374	467,068
Accumulated Amortization	(173,903)	(146,131)
Distribution rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	23,279	16,101
Accumulated Amortization	(14,393)	(14,243)
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	384,821	396,269
Accumulated Amortization	(8,929)	(2,764)
Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,186	337
Accumulated Amortization	$ (522)	$ (309)